Remove deprecated python3-enum from the RDEPENDS

The python3-enum package was removed as part of the migration to the
json manifest file.  The functionality is now part of core

Signed-off-by: Derek Straka <derek@asterius.io>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-python/recipes-devtools/python/python3-pysocks_1.6.8.bb

@@ -2,7 +2,6 @@ inherit pypi setuptools3
 require python-pysocks.inc
 
 RDEPENDS_${PN}_class-target += "\
-    ${PYTHON_PN}-enum \
     ${PYTHON_PN}-netclient \
     ${PYTHON_PN}-selectors \
 "